PI_SC1271K rev B 060515_Off-Line CVCC Flyback Switcher IC with Integrated MOS

SC1271KInnoSwitch FamilyJune 2015Off-Line CV/CC Flyback Switcher IC with Integrated MOSFET, Synchronous Rectification and FeedbackThis Product is Covered by Patents and/or Pending Patent Applications.Product HighlightsHighly Integrated, Compact Footprint• Incorporates flyback controller, 725 V MOSFET, secondary-sidesensing and synchronous rectification driver• Integrated FluxLink ™, HIPOT-isolated, feedback link • E xceptional CV/CC accuracy, independent of transformer design or external components • I nstantaneous transient response ±5% CV with 0%-100%-0% load stepEcoSmart ™– Energy Efficient• <10 mW no-load at 230 VAC when supplied by transformer biaswinding • E asily meets all global energy efficiency regulations • L ow heat dissipationAdvanced Protection / Safety Features• Primary sensed output OVP •S econdary sensed output overshoot clamp •S econdary sensed output OCP to zero output voltage •H ysteretic thermal shutdown Full Safety and Regulatory Compliance• 100% production HIPOT compliance testing at 6 kV DC/1 sec • Reinforced insulation• Isolation voltage >3,500 VAC•U L1577 and TUV (EN60950) safety approved •EN61000-4-8 (100 A/m) and EN61000-4-9 (1000 A/m) compliantGreen Package• H alogen free and RoHS compliantApplications• C hargers and adapters for smart mobile devices • H igh efficiency, low voltage, high current power suppliesDescriptionThe InnoSwitch ™ family of ICs dramatically simplifies the development and manufacturing of low-voltage, high current power supplies,particularly those in compact enclosures or with high efficiency require-ments. The InnoSwitch architecture is revolutionary in that the devices incorporate both primary and secondary controllers, with sense elements and a safety-rated feedback mechanism into a single IC.Close component proximity and innovative use of the integrated communication link permit accurate control of a secondary-side synchronous rectification MOSFET and optimization of primary-side switching to maintain high efficiency across the entire load range. Additionally, the minimal DC bias requirements of the link enables the system to achieve less than 10 mW no-load in challenging applications such as smart-mobile device chargers.Output Power TableProduct 385-265 VACAdapter 1Peak or Open Frame 2SC1271K20 W25 WTable 1. Output Power Table.Notes:1. Minimum continuous power in a typical non-ventilated enclosed typical size adapter measured at 40 °C ambient. Max output power is dependent on the design. With condition that package temperature must be < = 125 °C.2. Minimum peak power capability.3. Package: eSOP-R16B.Figure 2. High Creepage, Safety-Compliant eSOP Package.PI-7519-020615OV O 1295C o n s t a n t V o l t a g e (C V )Constant Current (CC)PI-7146-121213(a) Typical Application Schematic(b) Output CharacteristicFigure 1. Typical Application/Performance.Figure 3. Primary-Side Controller Block Diagram.Figure 4. Secondary-Side Controller Block Diagram. Figure 5. Pin Configuration.Pin Functional DescriptionDRAIN (D) Pin (Pin 1)This pin is the power MOSFET drain connection.SOURCE (S) Pin (Pin 3-6)This pin is the power MOSFET source connection. It is also theground reference for the BYPASS and FEEDBACK pins.PRIMARY BYPASS (BPP) Pin (Pin 7)It is the connection point for an external bypass capacitor for the primary IC supply.FORWARD (FWD) Pin (Pin 10)The connection point to the switching node of the transformer output winding for sensing and other functions.OUTPUT VOLTAGE (VOUT) Pin (Pin 11)This pin is connected directly to the output voltage of the power supply to provide bias to the secondary IC.SYNCHRONOUS RECTIFIER DRIVE (SR) Pin (Pin 12) Connection to external SR FET gate terminal.SECONDARY BYPASS (BPS) Pin (Pin 13)It is the connection point for an external bypass capacitor for the secondary IC supply.FEEDBACK (FB) Pin (Pin 14)This pin connects to an external resistor divider to set the power supply CV voltage regulation threshold.SECONDARY GROUND (GND) (Pin 15)Ground connection for the secondary IC.ISENSE (IS) Pin (Pin 16)Connection to the power supply output terminals. Internal current sense is connected between this pin and the SECONDARY GROUND pin.Absolute Maximum Ratings 1,2DRAIN Pin Voltage ....................................................-0.3 V to 725 V DRAIN Pin Peak Current 3 .........................................1680 (3150) mA PRIMARY BYPASS/SECONDARY BYPASS Pin Voltage ........-0.3 V to 9 V PRIMARY BYPASS/SECONDARY BYPASS Pin Current ...............100 mA FORWARD Pin Voltage ..............................................-1.5 V to 150 V FEEDBACK Pin Voltage ....................................................-0.3 to 9 V 6SR/P Pin Voltage ..............................................................-0.3 to 9 V OUTPUT VOLTAGE Pin Voltage ........................................-0.3 to 15 V Storage Temperature ...................................................-65 to 125 °C Operating Junction Temperature 4,6 ...............................-40 to 125 °C Ambient Temperature ...................................................-40 to 85 °C Lead Temperature 5 ................................................................260 °CNotes:1. All voltages referenced to Source and Secondary Ground, T A = 25 °C.2. Maximum ratings specified may be applied one at a time without causing permanent damage to the product. Exposure to Absolute Maximum Ratings conditions for extended periods of time may affect product reliability.3. Higher peak Drain current is allowed while the Drain voltage is simultaneously less than 400 V.4. Normally limited by internal circuitry.5. 1/16” from case for 5 seconds.6. -1.8 V for a duration of ≤500 nsec.7. Maximum silicon operating junction temperature is 150 °C, however safety agency maximum operating junction is 125 °C.8. The maximum current out of the FORWARD pin when the FORWARD pin is below Ground is -40 mA.9. Maximum current into VOUT pin at 15 V should not exceed 10 mA.Thermal ResistanceThermal Resistance: eSOP-R16B Package: (q JA ).......................... ................65 °C/W 2, 69 °C/W 1(q JC ) .......................................................12 °C/W 3Notes:1. Solder to 0.36 sq. in (232 mm 2), 2 oz. (610 g/m 2) copper clad.2. Solder to 1 sq. in (645 mm 2), 2 oz. (610 g/m 2) copper clad.3. The case temperature is measured at the plastic surface at the top of the package.NOTES:A. This parameter is derived from characterization.B. I S1 is an estimate of device current consumption at no-load, since the operating frequency is so low under these conditions. Total deviceconsumption at no-load is sum of I S1 and I DSS2 (this does not include secondary losses)C. Since the output MOSFET is switching, it is difficult to isolate the switching current from the supply current at the Drain. An alternative is to measure the PRIMARY BYPASS pin current at 6.2 V.D. The PRIMARY BYPASS pin is not intended for sourcing supply current to external circuitry.E. To ensure correct current limit it is recommended that nominal 0.1 m F/1 m F/10 m F capacitors are used. In addition, the BPP capacitor valuetolerance should be equal or better than indicated below across the ambient temperature range of the target application. The minimum and maximum capacitor values are guaranteed by characterization.F. This parameter is derived from the change in current limit measured at 1X and 4X of the di/dt shown in the I LIMIT specification.G. Auto-restart on-time has same temperature characteristics as the oscillator (inversely proportional to frequency).H. I DSS1 is the worst-case OFF-state leakage specification at 80% of BV DSS and the maximum operating junction temperature. I DSS2 is a typicalspecification under worst-case application conditions (rectified 230 VAC) for no-load consumption calculations.I. Breakdown voltage may be checked against minimum BV DSS specification by ramping Drain voltage up to but not exceeding minimum BV DSS .J. For reference only. This is the total range of current limit threshold which corrects for variations in the current sense bond wire. Both of which are trimmed to set the normalized output constant current.K. Measured at the VOUT pin of the device. At the end of the cable under-load, the apparent auto-restart threshold will be lower.Nominal PRIMARY BYPASS Pin Capacitor Value Tolerance Relative to Nominal Capacitor Value Minimum Maximum0.1 m F -60%+100%1 m F -50%+100%10 m F -50%N/APart Ordering TableProduct Cable CompensationSC1271K6%For the latest updates, visit our website: Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power Integrations does not assume any liability arising from the use of any device or circuit described herein. POWER INTEGRATIONS MAKES NO WARRANTYHEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS.Patent InformationThe products and applications illustrated herein (including transformer construction and circuits external to the products) may be covered by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A complete list of Power Integrations patents may be found at . Power Integrations grants its customers a license under certain patent rights as set forth at /ip.htm.Life Support PolicyPOWER INTEGRATIONS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF POWER INTEGRATIONS. As used herein:1. A Life support device or system is one which, (i) is intended for surgical implant into the body, or (ii) supports or sustains life, and (iii) whosefailure to perform, when properly used in accordance with instructions for use, can be reasonably expected to result in significant injury or death to the user.2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause thefailure of the life support device or system, or to affect its safety or effectiveness.The PI logo, TOPSwitch, TinySwitch, LinkSwitch, LYTSwitch, InnoSwitch, DPA-Switch, PeakSwitch, CAPZero, SENZero, LinkZero, HiperPFS, HiperTFS, HiperLCS, Qspeed, EcoSmart, Clampless, E-Shield, Filterfuse, FluxLink, StakFET, PI Expert and PI FACTS are trademarks of Power Integrations, Inc. Other trademarks are property of their respective companies. ©2015, Power Integrations, Inc.World Headquarters 5245 Hellyer AvenueSan Jose, CA 95138, USA.Main: +1-408-414-9200Customer Service:Phone: +1-408-414-9665Fax: +1-408-414-9765e-mail: usasales@ China (Shanghai)Rm 2410, Charity Plaza, No. 88North Caoxi RoadShanghai, PRC 200030Phone: +86-21-6354-6323Fax: +86-21-6354-6325e-mail: chinasales@China (Shenzhen)17/F, Hivac Building, No. 2, Keji Nan 8th Road, Nanshan District, Shenzhen, China, 518057Phone: +86-755-8672-8689Fax: +86-755-8672-8690e-mail: chinasales@GermanyLindwurmstrasse 11480337 Munich GermanyPhone: +49-895-527-39110Fax: +49-895-527-39200e-mail: eurosales@ India#1, 14th Main Road VasanthanagarBangalore-560052 India Phone: +91-80-4113-8020Fax: +91-80-4113-8023e-mail: indiasales@ItalyVia Milanese 20, 3rd. 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SG1 2EF United Kingdom Phone: +44 (0) 1252-730-141Fax: +44 (0) 1252-727-689e-mail: eurosales@ Power Integrations Worldwide Sales Support LocationsRevisionNotes Date A Initial Release.04/15BChanged Bypass Capacitor selection and limit on non-critical parameters.06/15。